GB/T 18882.3-2019 PDF English
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| GB/T 18882.3-2019 | English | 199 |
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Chemical analysis methods for mixed rare earth oxide of ion-adsorption rare earth ore -- Part 3: Determination of silicon dioxide content
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| GB/T 18882.3-2002 | English | 319 |
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Chemical analysis methods for mixed rare earth oxide of ion-absorbed type RE ore -- Determination of fifteen REO relative content -- Inductively coupled plasma atomic emission spectrographic method
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GB/T 18882.3-2019: Chemical analysis methods for mixed rare earth oxide of ion-adsorption rare earth ore -- Part 3: Determination of silicon dioxide content
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Chemical analysis methods for mixed rare earth oxide of ion-adsorption rare earth ore - Part 3. Determination of silicon dioxide content
ICS 77.120.99
H14
National Standards of People's Republic of China
Ion-type rare earth ore mixed rare earth oxide chemical analysis method
Part 3. Determination of silica content
Chemicalanalysismethodsformixedrareearthoxideofion-adsorptionrareearthore-
Part 3. Determinationofsilicondioxidecontent
Published on.2019-08-30
2020-07-01 implementation
State market supervision and administration
China National Standardization Administration issued
Foreword
GB/T 18882 "Ion-type rare earth ore mixed rare earth oxide chemical analysis method" is divided into three parts.
--- Part 1. Determination of the composition of fifteen rare earth element oxides;
--- Part 2. Determination of the amount of aluminum oxide;
--- Part 3. Determination of silica content.
This part is the third part of GB/T 18882.
This part is drafted in accordance with the rules given in GB/T 1.1-2009.
This part is proposed and managed by the National Rare Earth Standardization Technical Committee (SAC/TC229).
This section drafted by. Zhangzhou Nonferrous Metallurgy Research Institute, Jidong Rare Earth Group Co., Ltd., Jixian Red Gold Rare Earth Co., Ltd., Guangdong
Zhujiang Rare Earth Co., Ltd., Jiangxi Golden Century New Materials Co., Ltd., Fujian Changting Jinlong Rare Earth Co., Ltd., Dingnan Dahua New Materials
Resources Co., Ltd., Baotou Rare Earth Research Institute, Hunan Rare Earth Metal Materials Research Institute, National Tungsten and Rare Earth Products Quality Supervision and Inspection Center, Jiangxi
Polytechnic University, China Nonferrous Guilin Mineral Geology Research Institute Co., Ltd., National Standard (Beijing) Inspection and Certification Co., Ltd., Guangdong Industrial Analysis
Testing center.
The main drafters of this section. Xie Lingjun, Li Ying, Liu Hong, Zhang Wenxing, Wen Bin, Liang Bin, Wang Dan, Yuan Jiao, Yang Feng, Xie Wei, Chen Tao, Liang Zhijie,
Liu Fuyu, Qi Qifan, Liu Rongli, Sun Linjing, Wu Weiming, Zhou Zhiping, Hu Wei, Bao Yelin, Yao Nanhong, Yang Danying, Liu Zhuying, Long Xudong,
Li Jingyan, Song Liping, Zhang Yanping, Yi Shi, Liu Helian, Xie Hui, Xiong Xiaoyan.
Ion-type rare earth ore mixed rare earth oxide chemical analysis method
Part 3. Determination of silica content
1 Scope
This part of GB/T 18882 specifies the determination method of silica content in ionic rare earth ore mixed rare earth oxides.
This section applies to the determination of silica content in ionic rare earth ore mixed rare earth oxides. There are two methods in total. Method 1 is divided into
Photometric method, method 2 is the gravimetric method. Determination range of method 1 (mass fraction). 0.10% to 2.00%; measurement range of method 2 (quality
Score). 1.00%~5.00%. When the measurement ranges of the two methods overlap, the method 1 is used as the arbitration method.
2 Method 1. Spectrophotometry
2.1 Principle
The sample is melt-decomposed with a sodium carbonate-boric acid mixed reagent. In a sulfuric acid medium, silicon and ammonium molybdate form a silicon molybdenum heteropoly acid, and a grass-sulfur mixed acid is used.
Elimination of phosphorus, arsenic heteropoly acid interference, ascorbic acid reduction silicon molybdenum heteropoly acid is low-cost silicon molybdenum blue heteropoly acid. At a wavelength of 650 nm at the spectrophotometer
The absorbance is measured.
2.2 Reagents or materials
Unless otherwise stated, the reagents used in this section are analytically pure reagents that meet national or industry standards. The water used is secondary water.
2.2.1 Anhydrous sodium carbonate.
2.2.2 Boric acid.
2.2.3 Sodium carbonate-boric acid mixed reagent. anhydrous sodium carbonate (2.2.1) and boric acid (2.2.2) are mixed uniformly at a mass ratio of 3.1.
2.2.4 Oxalic acid.
2.2.5 Hydrochloric acid (ρ=1.19g/mL), excellent grade pure.
2.2.6 Sulfuric acid (ρ=1.84g/mL), excellent grade.
2.2.7 Ammonia water, excellent grade pure.
2.2.8 Hydrochloric acid (1 1).
2.2.9 Sulfuric acid (1 1).
2.2.10 Sulfuric acid (1 35).
2.2.11 p-Nitrophenol solution (1g/L).
2.2.12 Ammonia (1 2).
2.2.13 Ammonium molybdate solution (80g/L).
2.2.14 Oxalic acid-sulfuric acid mixed acid. Weigh 2.0 g of oxalic acid (2.2.4) in 100 mL of sulfuric acid (2.2.9).
2.2.15 Ascorbic acid solution (100g/L), ready for use.
2.2.16 Standard storage solution of silica. Weigh 0.4000g of silica [w(SiO2) >99.9%, and cool it to room at 120°C for 2h.
Warm], placed in a platinum crucible containing 5 g of anhydrous sodium carbonate (2.2.1), mixed, and then covered with 1 g of anhydrous sodium carbonate (2.2.1), placed
Melt at 900 ° C ~ 950 ° C for 30 min, slightly cold, rinse the outside with water and place it in a 300 mL Teflon beaker.
80 mL of hot water was leached, washed, cooled, placed in a.200 mL volumetric flask, diluted with water to the mark, and stored in a polyethylene bottle. This solution
1 mL of liquid contained 2 mg of silica.
GB/T 18882.3-2019
Chemical analysis methods for mixed rare earth oxide of ion-adsorption rare earth ore - Part 3. Determination of silicon dioxide content
ICS 77.120.99
H14
National Standards of People's Republic of China
Ion-type rare earth ore mixed rare earth oxide chemical analysis method
Part 3. Determination of silica content
Chemicalanalysismethodsformixedrareearthoxideofion-adsorptionrareearthore-
Part 3. Determinationofsilicondioxidecontent
Published on.2019-08-30
2020-07-01 implementation
State market supervision and administration
China National Standardization Administration issued
Foreword
GB/T 18882 "Ion-type rare earth ore mixed rare earth oxide chemical analysis method" is divided into three parts.
--- Part 1. Determination of the composition of fifteen rare earth element oxides;
--- Part 2. Determination of the amount of aluminum oxide;
--- Part 3. Determination of silica content.
This part is the third part of GB/T 18882.
This part is drafted in accordance with the rules given in GB/T 1.1-2009.
This part is proposed and managed by the National Rare Earth Standardization Technical Committee (SAC/TC229).
This section drafted by. Zhangzhou Nonferrous Metallurgy Research Institute, Jidong Rare Earth Group Co., Ltd., Jixian Red Gold Rare Earth Co., Ltd., Guangdong
Zhujiang Rare Earth Co., Ltd., Jiangxi Golden Century New Materials Co., Ltd., Fujian Changting Jinlong Rare Earth Co., Ltd., Dingnan Dahua New Materials
Resources Co., Ltd., Baotou Rare Earth Research Institute, Hunan Rare Earth Metal Materials Research Institute, National Tungsten and Rare Earth Products Quality Supervision and Inspection Center, Jiangxi
Polytechnic University, China Nonferrous Guilin Mineral Geology Research Institute Co., Ltd., National Standard (Beijing) Inspection and Certification Co., Ltd., Guangdong Industrial Analysis
Testing center.
The main drafters of this section. Xie Lingjun, Li Ying, Liu Hong, Zhang Wenxing, Wen Bin, Liang Bin, Wang Dan, Yuan Jiao, Yang Feng, Xie Wei, Chen Tao, Liang Zhijie,
Liu Fuyu, Qi Qifan, Liu Rongli, Sun Linjing, Wu Weiming, Zhou Zhiping, Hu Wei, Bao Yelin, Yao Nanhong, Yang Danying, Liu Zhuying, Long Xudong,
Li Jingyan, Song Liping, Zhang Yanping, Yi Shi, Liu Helian, Xie Hui, Xiong Xiaoyan.
Ion-type rare earth ore mixed rare earth oxide chemical analysis method
Part 3. Determination of silica content
1 Scope
This part of GB/T 18882 specifies the determination method of silica content in ionic rare earth ore mixed rare earth oxides.
This section applies to the determination of silica content in ionic rare earth ore mixed rare earth oxides. There are two methods in total. Method 1 is divided into
Photometric method, method 2 is the gravimetric method. Determination range of method 1 (mass fraction). 0.10% to 2.00%; measurement range of method 2 (quality
Score). 1.00%~5.00%. When the measurement ranges of the two methods overlap, the method 1 is used as the arbitration method.
2 Method 1. Spectrophotometry
2.1 Principle
The sample is melt-decomposed with a sodium carbonate-boric acid mixed reagent. In a sulfuric acid medium, silicon and ammonium molybdate form a silicon molybdenum heteropoly acid, and a grass-sulfur mixed acid is used.
Elimination of phosphorus, arsenic heteropoly acid interference, ascorbic acid reduction silicon molybdenum heteropoly acid is low-cost silicon molybdenum blue heteropoly acid. At a wavelength of 650 nm at the spectrophotometer
The absorbance is measured.
2.2 Reagents or materials
Unless otherwise stated, the reagents used in this section are analytically pure reagents that meet national or industry standards. The water used is secondary water.
2.2.1 Anhydrous sodium carbonate.
2.2.2 Boric acid.
2.2.3 Sodium carbonate-boric acid mixed reagent. anhydrous sodium carbonate (2.2.1) and boric acid (2.2.2) are mixed uniformly at a mass ratio of 3.1.
2.2.4 Oxalic acid.
2.2.5 Hydrochloric acid (ρ=1.19g/mL), excellent grade pure.
2.2.6 Sulfuric acid (ρ=1.84g/mL), excellent grade.
2.2.7 Ammonia water, excellent grade pure.
2.2.8 Hydrochloric acid (1 1).
2.2.9 Sulfuric acid (1 1).
2.2.10 Sulfuric acid (1 35).
2.2.11 p-Nitrophenol solution (1g/L).
2.2.12 Ammonia (1 2).
2.2.13 Ammonium molybdate solution (80g/L).
2.2.14 Oxalic acid-sulfuric acid mixed acid. Weigh 2.0 g of oxalic acid (2.2.4) in 100 mL of sulfuric acid (2.2.9).
2.2.15 Ascorbic acid solution (100g/L), ready for use.
2.2.16 Standard storage solution of silica. Weigh 0.4000g of silica [w(SiO2) >99.9%, and cool it to room at 120°C for 2h.
Warm], placed in a platinum crucible containing 5 g of anhydrous sodium carbonate (2.2.1), mixed, and then covered with 1 g of anhydrous sodium carbonate (2.2.1), placed
Melt at 900 ° C ~ 950 ° C for 30 min, slightly cold, rinse the outside with water and place it in a 300 mL Teflon beaker.
80 mL of hot water was leached, washed, cooled, placed in a.200 mL volumetric flask, diluted with water to the mark, and stored in a polyethylene bottle. This solution
1 mL of liquid contained 2 mg of silica.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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